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diapir
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A diapir is a type of intrusion in which a more mobile and ductile material is forced into brittle overlying rocks. Diapirs can be igneous, non-igneous, or salt-related, and they can form various geological structures and trap hydrocarbons.
diapir, (from Greek diapeirein, "to pierce"), geological structure consisting of mobile material that was forced into more brittle surrounding rocks, usually by the upward flow of material from a parent stratum.The flow may be produced by gravitational forces (heavy rocks causing underlying lighter rocks to rise), tectonic forces (mobile rocks being squeezed through less mobile rocks by ...
Astronaut photography of Jashak salt dome (the white area in the middle) in the Zagros Mountains in Bushehr province, Iran Salt dome in Fars province, Iran. A salt dome is a type of structural dome formed when salt (or other evaporite minerals) intrudes into overlying rocks in a process known as diapirism.Salt domes can have unique surface and subsurface structures, and they can be discovered ...
The meaning of DIAPIR is an anticlinal fold in which a mobile core has broken through brittle overlying rocks.
The Tiddlybanken diapir is an isolated, linear, symmetric structure with anticlines extending away from both ends of the diapir. Four suprasalt intervals can be identified (Fig. 11): (1) a prekinematic section of Middle Permian to Lower Triassic strata; (2) a Lower-Middle Triassic sequence that thins toward the diapir and is truncated by a prominent unconformity that dips inward toward the ...
As a diapir grows, so the deviatoric stress increases, tending t o accelerate the growth of the diapir. But in mudstone diapirs, all the quantities in eq. 15.5 change with time. In particular, the mudstone tends to compact, and eventually mechanical equilibrium will be reached. The effect of these forces depends on the size of the forces and ...
Learn how salt layers can rise and deform to form diapirs in extensional tectonic settings. Explore the initiation, growth, and sedimentation associated with diapirs, and see examples and diagrams.
Diapirism is the process of buoyant and deformable material rising through surrounding rocks, forming a blob-like structure. It is associated with various geological phenomena, such as salt domes, gas hydrates, volcanism, and mantle-crustal interactions.
The term diapir (from the Greek word that means, 'to pierce') was introduced by Mrazec (1915) for intrusive salt bodies that developed from salt layers in the crests of anticlines. The term is used in a general sense for a pluglike mass of any rock kind that pierced through overlying rock units and became lodged in them.
A diapir is a relatively mobile mass that intrudes into preexisting rocks, such as salt, shale or hot magma. Diapirs can form anticlines, salt domes and other structures that trap hydrocarbons.